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A prospective case study of high boost, high frequency emphasis and two-way diffusion filters on MR images of glioblastoma multiforme

  • B. N. Anoop
  • Justin Joseph
  • J. Williams
  • J. Sivaraman Jayaraman
  • Ansa Maria Sebastian
  • Praveer Sihota
Scientific Paper

Abstract

Glioblastoma multiforme (GBM) appears undifferentiated and non-enhancing on magnetic resonance (MR) imagery. As MRI does not offer adequate image quality to allow visual discrimination of the boundary between GBM focus and perifocal vasogenic edema, surgical and radiotherapy planning become difficult. The presence of noise in MR images influences the computation of radiation dosage and precludes the edge based segmentation schemes in automated software for radiation treatment planning. The performance of techniques meant for simultaneous denoising and sharpening, like high boost filters, high frequency emphasize filters and two-way anisotropic diffusion is sensitive to the selection of their operational parameters. Improper selection may cause overshoot and saturation artefacts or noisy grey level transitions can be left unsuppressed. This paper is a prospective case study of the performance of high boost filters, high frequency emphasize filters and two-way anisotropic diffusion on MR images of GBM, for their ability to suppress noise from homogeneous regions and to selectively sharpen the true morphological edges. An objective method for determining the optimum value of the operational parameters of these techniques is also demonstrated. Saturation Evaluation Index (SEI), Perceptual Sharpness Index (PSI), Edge Model based Blur Metric (EMBM), Sharpness of Ridges (SOR), Structural Similarity Index Metric (SSIM), Peak Signal to Noise Ratio (PSNR) and Noise Suppression Ratio (NSR) are the objective functions used. They account for overshoot and saturation artefacts, sharpness of the image, width of salient edges (haloes), susceptibility of edge quality to noise, feature preservation and degree of noise suppression. Two-way diffusion is found to be superior to others in all these respects. The SEI, PSI, EMBM, SOR, SSIM, PSNR and NSR exhibited by two-way diffusion are 0.0016 ± 0.0012, 0.2049 ± 0.0187, 0.0905 ± 0.0408, 2.64 × 1012 ± 1.6 × 1012, 0.9955 ± 0.0024, 38.214 ± 5.2145 and 0.3547 ± 0.0069, respectively.

Keywords

Glioblastoma multiforme High boost filters High frequency emphasis filters Two-way anisotropic diffusion Denoising Sharpening 

Notes

Compliance with ethical standards

Conflict of interest

Authors declare that we have no conflict of interest.

Ethical Approval

No experiments on human or animals or harmful to the environment is involved in this study. No trials on human is involved. The MR images used in this study is blinded.

Research involving human participants

This article does not contain any studies with human participants performed by any of the authors.

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Copyright information

© Australasian College of Physical Scientists and Engineers in Medicine 2018

Authors and Affiliations

  • B. N. Anoop
    • 1
  • Justin Joseph
    • 2
  • J. Williams
    • 3
  • J. Sivaraman Jayaraman
    • 4
  • Ansa Maria Sebastian
    • 1
  • Praveer Sihota
    • 5
  1. 1.School of ElectronicsSt. Joseph’s College of Engineering & TechnologyPalaiIndia
  2. 2.Department of Biomedical EngineeringNational Institute of TechnologyRaipurIndia
  3. 3.Department of E.N.T and Head and Neck SurgeryAll Indian Institute of Medical SciencesRaipurIndia
  4. 4.Department of Biotechnology and Medical EngineeringNational Institute of TechnologyRourkelaIndia
  5. 5.Center for Biomedical EngineeringIndian Institute of TechnologyRoparIndia

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